Name: USA Truflate type couplers and plugs, Automotive type sockets and nipples; Shape: Female, male, push on ... 1 / 4", 3 / 8", 1 / 2"; Coupler type: Truflate type, automotive type; Surface treatment: Zinc plated; Working pressure: No more than ... Centi; Application: Pneumatic tools, general air connections, air piping systems, air pressure equipments; The quick couplers include: Female thread socket ...